We have known that the basic feature of nylon fabric is that the surface is bright, while polyester is Matt, but polyester can also be made like the surface of nylon. This material is called imitation nylon, in fact, it is made of polyester. A long time ago, the fabric used for down clothing was real nylon, and the spinning was thin and tight, so the price of this kind of fabric was very expensive. With the continuous improvement of polyester spinning technology, the polyester down clothing materials were made out. The appearance and feel of the polyester down clothing fabric were almost the same as that of nylon, and the price was greatly reduced, so now the down clothing is also more and more The cheaper it is.